Quasi-resonant dual mode soft switching PWM and PDM high-frequency inverter with IH load resonant tank

Nabil A. Ahmed, Ahmad Eid, Hyun Woo Lee, Mutsuo Nakaoka, Yuta Miura, Tarek Ahmed, Eiji Hiraki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

26 Citations (Scopus)


In this paper, a novel type auxiliary active resonant capacitor snubber assisted zero current soft switching pulse modulation Single-Ended Push Pull (SEPP) series load resonant inverter with two auxiliary resonant lossless inductor snubbers is proposed for consumer high-frequency induction heating (IH) appliances. Its operating principle in steady state is described by using each mode equivalent circuits. The new multi resonant high-frequency inverter can regulate its output power under a condition of a constant frequency zero current soft switching (ZCS) commutation principle on the basis of asymmetrical PWM control scheme. The consumer brand-new IH products using proposed ZCS-PWM series load resonant SEPP high-frequency inverter is evaluated and discussed as compared with conventional high-frequency inverter on the basis of experimental results. In order to extend ZCS operation ranges under a low power setting PWM, the pulse density modulation (PDM) atrategy is demonstrated for high frequency multi resonant inverter. Its practical effectiveness is substantially proved from an application point of view.

Original languageEnglish
Title of host publication36th IEEE Power Electronics Specialists Conference 2005
Number of pages6
Publication statusPublished - 2005
Externally publishedYes

Publication series

NamePESC Record - IEEE Annual Power Electronics Specialists Conference
ISSN (Print)0275-9306


  • Asymmetrical PWM control scheme
  • Auxiliary switched capacitor
  • Consumer induction heater
  • Dual mode PWM and PDM control scheme
  • High frequency inverter
  • Lossless inductor snubbers
  • Series capacitor compensated resonant load
  • Zero current soft switching

ASJC Scopus subject areas

  • Modelling and Simulation
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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